This allows users to "map" (or "link") symbols with different names so that they can be compared without having to update either the target or base objects. Symbol mappings are persisted in objdiff.json, so generators will need to ensure that they're preserved when updating. (Example: d1334bb79e)
Resolves#117
With filter option to display them,
if desired. decomp-toolkit will
start writing auto-generated objects
in objdiff.json for reporting
purposes, so this maintains the
existing behavior.
